Climate can change fast, even when the planet looks stable. Earth has flipped into new patterns within decades in the past.

In the Cretaceous period, Earth was plagued by widespread volcanic activity, oceanic oxygen depletion events, and mass extinctions. Fossils from that era remain and continue to give scientists clues ...

Our species likes it cold. Homo sapiens evolved in — and still inhabits — one of Earth’s rare and fragile ice ages, periods distinguished not by an abundance of saber-toothed cats and woolly mammoths ...

A new study finds that one of the hottest periods in Earth's history may have driven lampreys apart -- genetically speaking. The work could have implications for how aquatic species respond to our ...

New research from Adelaide University suggests the power of the ancient Tethys Ocean might have shaped Central Asia's ...

Sixty-six million years ago, at the end of the Cretaceous Period, an asteroid impact near the Yucatán Peninsula of Mexico triggered the extinction of all known non-bird dinosaurs. But for the early ...

Germany's waters once saw a recently discovered new reptile species known as the Enalioetes schroederi, best characterized as a crocodile which has dolphin-like qualities which lived around 135 ...